RE: [xsl] Proposal: Copying with Sorting

["Michael Kay" <michael.h.kay@xxxxxxxxxxxx>]

> Thank you Mike,
> 
> > XSLT 2.0 allows you to create a sorted sequence of nodes using the
> > sort() function, with named sort keys:
> > 
> > <xsl:sort-key name="sk1">
> >   <xsl:sort select="exp2"/>
> > </xsl:sort-key>
> > 
> > <xsl:copy-of select="sort('sk1', exp)"/>
> 
> This is really great. 
> 
> Due to the global scope of a sort key and the brevity of the 
> spec on sort keys and the sort() function, there are still 
> some questions:
> 
> 1. Are there any limitations on exp2 above? Would it be 
> allowed to contain xsl:variable references, xsl:function 
> references or the key() function?

It can contain all these things, subject to the general rules that
disallow circular references.
> 
> 2. Would it be possible for exp2 to contain a reference to a 
> locally defined xsl:variable (not a top-level one)?

No, the xsl:sort-key element is top-level, so there will be no
locally-defined variables in scope. Do you have a use case where this
creates a problem?

Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx 


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